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Add 15/9 and 25/20

1st number: 1 6/9, 2nd number: 1 5/20

15/9 + 25/20 is 35/12.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 9 and 20 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 9 × 20 = 180,
    15/9 = 15 × 20/9 × 20 = 300/180
  3. Likewise, for the 2nd fraction, since 20 × 9 = 180,
    25/20 = 25 × 9/20 × 9 = 225/180
  4. Add the two like fractions:
    300/180 + 225/180 = 300 + 225/180 = 525/180
  5. 525/180 simplified gives 35/12
  6. So, 15/9 + 25/20 = 35/12
    In mixed form: 211/12

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